The updated Google Music app -- part of what you'll need to take part in all this newfangled digital music goodness -- is now live in the Android Market. If you're into changelogs, it reads as follows:
1. Google Music is now out of beta and is open to all users without an invitation. Upload up to 20,000 songs from your personal music collection to Google Music and listen instantly on all your devices.
2. Seamless integration with the Android Market music store. All your purchases automatically appear in the Google Music app.
What we don't yet have is that updated Android Market on our phones. But, in the meantime, you can purchase from the Android Market website.